Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9755777 | Optical transmitter and optical transmission method | Tomoyuki Sakata, Tatsuro Kishida, Koji Matsunaga, Tatsuya Toyozumi, Yuichiro Sakane +1 more | 2017-09-05 |
| 9537599 | Optical transmitter and optical transmission method | Tomoyuki Sakata, Tatsuro Kishida, Koji Matsunaga, Tatsuya Toyozumi, Yuichiro Sakane +1 more | 2017-01-03 |
| 9450698 | Optical transmission device, optical transmission system, and optical transmission method | Koji Matsunaga, Tatsuya Toyozumi, Yasuo Tanaka, Yuichiro Sakane, Wataru Kawasaki +1 more | 2016-09-20 |
| 9270382 | Optical communication apparatus and control method thereof | Yuichiro Sakane, Koji Matsunaga, Yasuo Tanaka, Tatsuya Toyozumi, Wataru Kawasaki +1 more | 2016-02-23 |
| 9112637 | Optical transmission device and method | Yuichiro Sakane, Tatsuya Toyozumi, Koji Matsunaga, Wataru Kawasaki, Tatsuhiko Saito | 2015-08-18 |
| 9077475 | Optical packet switching system and method for controlling the peak power | Tatsuhiko Saito, Satoru Okano | 2015-07-07 |
| 8666243 | Optical transmission device, optical transmission method, and recording medium thereof | Seiji Sugiyama, Akira Yamamoto, Makoto Ohtou | 2014-03-04 |
| 8189180 | Optical fiber transmission line measurement apparatus and system | Taro Asao, Yoshinori Tochiki, Haruka Miyazaki, Akira Yamamoto, Katsumi Sugawa +2 more | 2012-05-29 |
| 7917033 | Wavelength-multiplexing optical transmission system and wavelength-multiplexing optical transmission method | Tomoyuki Sakata, Akira Yamamoto, Kouji Tanonaka | 2011-03-29 |